Pump-rod and casing handling device



' F. W. CARLSON I x PUMP ROD AND CASING HANDLING DEVICE Filed June 8. 1925 KIM/Carlson Patented Nov. 10, 1925.

FRANK WILLIAM cAnLsomor oILrIELns, CALIFORNIA.

PUMP-ROD AND CASING 'IIAND InG DEVICE.

Application filed me s, 1925. Serial- No. 's5,s15.'

To all whom it may concern:

Be it known that I, FRANK IV. CARLSON, citizen of the United States, residing at Oilfields, in the county of Fresno and State of California, have invented certain new and useful Improvements in Pump-Rod and Casing Handling Devices, of which the following is a specification.

This invention relates to a pump rod and pipe handling device of the character of that shown inmy. co-pending application, 753,532, filed December 19th, 1924. It was formerly the practice, prior to my previous invention, in removing pump rods from deep wells, to hoist the rods out in stands, each stand consistingof two or three lengths of pump rod and to lay-the stands out upon the ground. A more modern method and the one now commonly employed is to hang these rods from rod hangers which are'in turlrli supported by the usual derrick of the we In my pending, application, above referred to, a structure is disclosed, by means of which one man can hold the stand of rods during the disengagement of the elevator therefrom and during the time that the stand is being unscrewed from the rods therebelow and transfer such rods to the hangers by which they are supported from the derrick.

The structure of the present invention is designed to accomplish the same result but represents an improvement over my previous construction in that'it is adapted to engage the pump rods at any suitable point in their length. In other words, it is not essential that the pump rods have collars formed upon them to be engaged by the device. Since the structure of the present invention is designed to engage a round element such as a rod, it is manifest that it may be used with equal facility upon 'ipes.

Further objects and a vantages of the invention will be set forth in the detailed description which follows.

In the accompanying drawing: Fig. 1 is a plan view of a rod gripping element constructed in accordance with the invention, F Fig.2 is a sectional view-upon line 6-6 of s Fig. 3 is a side elevation of theconstruction,

Fig. 4 is a plan view of one of the gripplng rollers hereinafter described, Fig. 5 is a side viewof said roller, and- PATENT 'oFFwsf Fig. 61 is a rear. elevation of the jaws by,

which the gripping'roll'ers are carried.

Like numerals designate corresponding parts in all of the figures of the drawing.

Referring to the drawings, '5 designatesa pump-rod'of conventional form and 6 the rod elevator. The parts so far described are of known construction and the invention resides more particularly. in the handling at 5 and the others of which are not shown) is transferred from elevator 6 to any suitable suspending device, notshown, but

. and -11, said arms; being pivoted after the device by which the stand of pump rods (the uppermost one of which is desi nated.

manner of tongs upon a bolt 12. Theupper end of this bolt is formed with an. eye 13 which receives one end of a cable 14.. Theother end of this cable is attached to the eye 15 of a bolt 16 said bolt being carried by.

guide bar 17. This bar is secured by abolt 18 to the arm 8. The bight portion of the cable 14 passes over apulley 19 the housing. 20 of which is suspended from any suitable point upon the derrick, not shown, by means of a suspension cable 21. A spring? pressed handle 22'- is adapted, when depressed, to draw upon a rod 23 and thereby rocka pawl 24 upon its pivot 25. This pawl engages the teeth 26 of an arcuate rack bar 27, and this pawl and ratchet con-v struction locks the'handles of arms-8 and, 9 in their closed position, atwhich time their Jaws 28 and 29 are trunnioned by outer ends 8, 9 are moved towards each other. means of the studs'30 and 31 upon the .-por tions 8 and 9 of the arms. These jaws are of U'-shape in cross section and constitute housings for tapered, rooved rollers 32,-33

and 34, the first two rollers being carried by the housing 28 and the-roller 34 .being carried by the housing 29. Y

The trunnioning of the housings with respect to the portions 8 ,9 of the arms,.per-' mits a limited rocking movement of these housings with respect to the said arms, though during the process of adjustment of the apparatus about the rod '5, the jaws are held 1n approximate horizontal alignment with the arms 8 ,9 by means of a spring 35, one end of which is attached to the housing 28 and the other end of which is attached to the arm 8. The two housings or jaws are 7 in that it enables the user to hold a stand held in proper ali nment with each other though being capa le of a limited separation, by means of a stud 36, said stud being threaded at 37 into a lug 38, of'the housing 28 and entering a slot 39 of-the housing 29. (See Fig. 6.') By referring to Fig. 2 it will be seen that the tapering grooved rollers are supported upon studs or, shafts 40, 41, which lie at an angle with respectto the vertical and consequently at an angle with the pump rod. Downward movement of the rollers is resisted by springs 43 which are seated in collars 44 and 45. Thus, any downward movement of the pump rod 5,

under the influence of gravity, will tend to cause the rollers 33, 34, and in like manher the roller 32, to move downwardly and toward the pump rod and this will, of course, cause a very tight grippingaction of these grooved rollers upon the pump rod. While I have referred to the use of thedevice'upon a pump rod, throughout this specification, it is manifest that the'-structure canbe used to equal advantage upon hollow bodies such as pipes and consequently it is to be understood that the structure is both a pump rod and pipe or casing handling device.

It is particularly to be noticed that the gripping devices are formed as rollers and that these rollers are peripherally grooved.

Thus, they exercise their gripping function ,to prevent vertical movement of the gripped object 5, with respect to them, while at the same time they permit rotation of such gripped object. This is of particular utility of rods without interfering with the operation of unscrewing the stand of rods from the rods that are still in the .well. Thus, if there is any tendenc to slip while the rods are being unscrewe these rollers will act of their own accord," due to their angular disposition to promptly grip the. supported object.

An important advantage of this construction is that if the rod stretches, under use, which they frequently do, it makes no difference from the operating standpoint since there is flexibility in this construction as to permitthe user to raise or lower the stand at will. It is to be understood that the invention is not limited to the preciseconstruction set forth but that it-includes within its purviewwhatever changes fairly come 'within either the terms or the spirit of the appended claims.

Having described my invention, what I claim is:

.1. A device of the character described comprising a air of members and means for moving tiem toward and from each other aiidaplurality of'rollers mounted for rotation with respect to said members and mounted upon axes which are inclined with respect to each other 2. A structure as recited in claim 1 in combination with spring means, tending to move said rollers along" said axes in "a direction to separate them.

3. A device of the character described comprising a pair of crossed and pivoted arms, a pair of jawstrunnioned in. said arms, a plurality .of rollers carried by said jaws and mounted upon axes inclined ivith respect to each other.

4. A device of the character described comprising a fpair of crossed and pivoted arms, a pair 0 housings trunnionedin said arms, a pluraltiy of grooved and tapered rollers mounted upon axes inclined with respect to each other in said housings and means for locking said arms in closed po-- combination with means for suspending said arms in a substantially horizontal plane.

8. A device of the character described comprising a pair of crossed and pivoted arms, a rack bar carried by one of said arms, a pawl carried by the other of said arms, a 'uide bar carried by one of. said arms and guiding the other of said arms, a pair of housings of substantial U-shape in cross section, trunnioned in the inner ends of said arms, a spring tending to maintain said housings in substantial horizontal align-- ment with the arms, means holding the housings 1 in alignment with each other while permitting limited lateral separation of the housings with respect to each other and a plurality of grooved and tapered rollers mounted upon and carried by said.

housings said rollers bcing'disposed at an inclination with respect to each other their point of greatest separation being at the top, and a spring bearing beneath said roll-" ers and tending to elevate them.-

In testimony whereof I aflix my signature.

FRANK WILLIAM CARLSON. 

